Four tubes P, Q, R and S were taken and filled half with a solution of aluminium sulphate in water Clean piece of metal zinc was placed in test tube P, iron nail in test tube Q, copper wire in test tube R and aluminium wire in test tube S What colour change will be observed in all the four test tubes respectively?

White, brown, blue, green

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Colourless, colourless, colourless, colourless

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Colourless, brown, blue, colourless

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Colourless, green, blue, colourless

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Solution

The correct option is B Colourless, colourless, colourless, colourless
Al metal comes on top of $Z n, C u$ and $F e$ metals in reactivity series so it can displace but these metals cannot displace aluminium from aluminium sulfate solution. So all tubes remain colorless.

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The correct option is B Colourless, colourless, colourless, colourlessAl metal comes on top of Zn,Cu and Fe metals in reactivity series so it can displace but these metals cannot displace aluminium from aluminium sulfate solution. So all tubes remain colorless.

The correct option is B Colourless, colourless, colourless, colourless
Al metal comes on top of $Z n, C u$ and $F e$ metals in reactivity series so it can displace but these metals cannot displace aluminium from aluminium sulfate solution. So all tubes remain colorless.